Check whether this time is offered.
Pick a time. One check runs the on-device resolver and shows the reason it already computed: offered, or refused.
This does not sync a live calendar, send email, take payment, or save a booking. The clock in the resolver is 8:00am, and the only busy blocks are the three it already knows: team standup, design sync, and a 1:1. The booking demo is a separate page and does not hold a calendar either.
No time checked yet.